Tag: chemistry

Questions Related to chemistry

The radius of nucleus is:

chemistry the structure of the atom discovery of charged particles the plum pudding atom discovery of electrons and protons

  1. proportional to its mass number

  2. inversely proportional to its mass number

  3. proportional to the cube root of its mass number

  4. not related to its mass number

Show answer
Correct Option: C
Explanation:
The radius of a nucleus (r) is proportional to the cube root of its mass number (A).
The approximate law is $r = r _0 \times A^{ 1/3 }$
where $r _0 = 1.2 \times 10^{ -15 }\ m$
option C is correct

The fibre developed in Newyork & London simultaneously is :

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. Nylon

  2. Rayon

  3. Teflon

  4. Silk

Show answer
Correct Option: A
Explanation:

Nylon got its name Ny from Newyork and Lon from London.
Option A is correct.

Which of the following do not contain polyester fabric?

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. Terrywool

  2. Terrycot

  3. Terylene

  4. Orlon

Show answer
Correct Option: D
Explanation:

Terrywool, Terrycot and Terylene all contain polyester.


Orlon is a polymer of vinyl cyanide. It is made by the addition of acrylonitrile molecules. It is a brand of the synthetic, acrylic textile fibre of the lightweight and wrinkle-resistant fabric.

Option D is correct.

Which of the following is a true statement?

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. Plastic is soluble in water

  2. Plastic is not a polymer

  3. Rayon is made from cellulose

  4. All plastics are fire-resistant

Show answer
Correct Option: C
Explanation:

Rayon is made from cellulose.

The first man - made polymer is :

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. PVC

  2. Teflon

  3. Bakelite

  4. Nylon

Show answer
Correct Option: C
Explanation:

Bakelite is a man made polymer by polymerization of phenol and formaldehyde. First Navoloc is formed and then Bakelite is formed.

Which of the following is known as regenerated fibre?

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. Nylon - 66

  2. Terylene

  3. Nylon - 6

  4. Rayon

Show answer
Correct Option: D
Explanation:

Rayon is known as regenerated fibre because it is manufactured from natural resources like cellulose present in wood pulp and short fibres.

Polyester consists of :

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. repeating unit of ether

  2. monomer of ester

  3. repeating units of ester

  4. monomer of ether

Show answer
Correct Option: C
Explanation:

Polyester is a category of polymers that contain ester in their main chain.


 Polyesters are used to make bottles, films, holograms, filters, dielectric film for capacitors, film insulation for wire and insulating tapes.

Hence the correct option is C.

______ is a popular polyester.

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. Plastic

  2. Polythene

  3. Rayon

  4. Terylene

Show answer
Correct Option: D
Explanation:

Terylene is a popular  trademark of synthetic polyester fibre. The fabric is based on terephthalic acid, characterized by lightness and crease resistance and used for clothing, sheets, ropes, sails, etc. 

PET is a familiar form of:

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. plastic

  2. polyester

  3. acrylic

  4. rayon

Show answer
Correct Option: B
Explanation:

PET is a very familiar form of polyester. PET is used for making bottles.

Which type of cloth dries faster in rainy season?

chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

  1. Cotton

  2. Wool

  3. Polyester

  4. Silk

Show answer
Correct Option: C
Explanation:

Synthetic fibres like polyesters dry up quickly.